2004•Metallurgical AnalysisRequires access

Determination of trace ironIII in water by decoloring spectrophotometry with chlorophosphonazo III

Han Chang-xiu

Abstract

A new catalytic spectrophotometric method for the determination of trace Fe*# has been developed.The method is based on the catalytic effect of Fe*# on the decoloring reaction of chlorophosphonazo Ⅲ oxidized by KIO_4 in the medium of H_2SO_4.The detection limit of this method is 3.8×10~(-9) g/mL for Fe*# and the linear relationship is in the concentration range of 0-1.5 μg/10 mL for Fe*#.Its recovery is in the range of 96.0%-102.5% and RSD is 1.9%-2.2%.It has been applied to the determination of iron in water with satisfactory results.

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Key concepts: Spectrophotometry, Detection limit, Chemistry, Linear range, Chromatography, Catalysis, Linear relationship, Nuclear chemistry